1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef CPU_X86_VM_INTERP_MASM_X86_HPP 26 #define CPU_X86_VM_INTERP_MASM_X86_HPP 27 28 #include "asm/macroAssembler.hpp" 29 #include "asm/macroAssembler.inline.hpp" 30 #include "interpreter/invocationCounter.hpp" 31 #include "runtime/frame.hpp" 32 33 // This file specializes the assember with interpreter-specific macros 34 35 36 class InterpreterMacroAssembler: public MacroAssembler { 37 38 #ifndef CC_INTERP 39 protected: 40 // Interpreter specific version of call_VM_base 41 virtual void call_VM_leaf_base(address entry_point, 42 int number_of_arguments); 43 44 virtual void call_VM_base(Register oop_result, 45 Register java_thread, 46 Register last_java_sp, 47 address entry_point, 48 int number_of_arguments, 49 bool check_exceptions); 50 51 virtual void check_and_handle_popframe(Register java_thread); 52 virtual void check_and_handle_earlyret(Register java_thread); 53 54 // base routine for all dispatches 55 void dispatch_base(TosState state, address* table, bool verifyoop = true); 56 #endif // CC_INTERP 57 58 public: 59 InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code), 60 _locals_register(LP64_ONLY(r14) NOT_LP64(rdi)), 61 _bcp_register(LP64_ONLY(r13) NOT_LP64(rsi)) {} 62 63 void load_earlyret_value(TosState state); 64 65 #ifdef CC_INTERP 66 void save_bcp() { /* not needed in c++ interpreter and harmless */ } 67 void restore_bcp() { /* not needed in c++ interpreter and harmless */ } 68 69 // Helpers for runtime call arguments/results 70 void get_method(Register reg); 71 72 #else 73 74 // Interpreter-specific registers 75 void save_bcp() { 76 movptr(Address(rbp, frame::interpreter_frame_bcp_offset * wordSize), _bcp_register); 77 } 78 79 void restore_bcp() { 80 movptr(_bcp_register, Address(rbp, frame::interpreter_frame_bcp_offset * wordSize)); 81 } 82 83 void restore_locals() { 84 movptr(_locals_register, Address(rbp, frame::interpreter_frame_locals_offset * wordSize)); 85 } 86 87 // Helpers for runtime call arguments/results 88 void get_method(Register reg) { 89 movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 90 } 91 92 void get_const(Register reg) { 93 get_method(reg); 94 movptr(reg, Address(reg, Method::const_offset())); 95 } 96 97 void get_constant_pool(Register reg) { 98 get_const(reg); 99 movptr(reg, Address(reg, ConstMethod::constants_offset())); 100 } 101 102 void get_constant_pool_cache(Register reg) { 103 get_constant_pool(reg); 104 movptr(reg, Address(reg, ConstantPool::cache_offset_in_bytes())); 105 } 106 107 void get_cpool_and_tags(Register cpool, Register tags) { 108 get_constant_pool(cpool); 109 movptr(tags, Address(cpool, ConstantPool::tags_offset_in_bytes())); 110 } 111 112 void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset); 113 void get_cache_and_index_at_bcp(Register cache, 114 Register index, 115 int bcp_offset, 116 size_t index_size = sizeof(u2)); 117 void get_cache_and_index_and_bytecode_at_bcp(Register cache, 118 Register index, 119 Register bytecode, 120 int byte_no, 121 int bcp_offset, 122 size_t index_size = sizeof(u2)); 123 void get_cache_entry_pointer_at_bcp(Register cache, 124 Register tmp, 125 int bcp_offset, 126 size_t index_size = sizeof(u2)); 127 void get_cache_index_at_bcp(Register index, 128 int bcp_offset, 129 size_t index_size = sizeof(u2)); 130 131 // load cpool->resolved_references(index); 132 void load_resolved_reference_at_index(Register result, Register index); 133 134 NOT_LP64(void f2ieee();) // truncate ftos to 32bits 135 NOT_LP64(void d2ieee();) // truncate dtos to 64bits 136 137 // Expression stack 138 void pop_ptr(Register r = rax); 139 void pop_i(Register r = rax); 140 void push_ptr(Register r = rax); 141 void push_i(Register r = rax); 142 143 #ifdef _LP64 144 void pop_l(Register r = rax); 145 void pop_f(XMMRegister r = xmm0); 146 void pop_d(XMMRegister r = xmm0); 147 void push_l(Register r = rax); 148 void push_f(XMMRegister r = xmm0); 149 void push_d(XMMRegister r = xmm0); 150 #else 151 void pop_l(Register lo = rax, Register hi = rdx); 152 void pop_f(); 153 void pop_d(); 154 155 void push_l(Register lo = rax, Register hi = rdx); 156 void push_d(Register r = rax); 157 void push_f(); 158 #endif // _LP64 159 160 void pop(Register r) { ((MacroAssembler*)this)->pop(r); } 161 void push(Register r) { ((MacroAssembler*)this)->push(r); } 162 void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); } 163 164 void pop(TosState state); // transition vtos -> state 165 void push(TosState state); // transition state -> vtos 166 167 // These are dummies to prevent surprise implicit conversions to Register 168 void pop(void* v); // Add unimplemented ambiguous method 169 void push(void* v); // Add unimplemented ambiguous method 170 171 void empty_expression_stack() { 172 movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize)); 173 // NULL last_sp until next java call 174 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 175 } 176 177 // Helpers for swap and dup 178 void load_ptr(int n, Register val); 179 void store_ptr(int n, Register val); 180 181 // Generate a subtype check: branch to ok_is_subtype if sub_klass is 182 // a subtype of super_klass. 183 void gen_subtype_check( Register sub_klass, Label &ok_is_subtype ); 184 185 // Dispatching 186 void dispatch_prolog(TosState state, int step = 0); 187 void dispatch_epilog(TosState state, int step = 0); 188 // dispatch via rbx (assume rbx is loaded already) 189 void dispatch_only(TosState state); 190 // dispatch normal table via rbx (assume rbx is loaded already) 191 void dispatch_only_normal(TosState state); 192 void dispatch_only_noverify(TosState state); 193 // load rbx from [_bcp_register + step] and dispatch via rbx 194 void dispatch_next(TosState state, int step = 0); 195 // load rbx from [_bcp_register] and dispatch via rbx and table 196 void dispatch_via (TosState state, address* table); 197 198 // jump to an invoked target 199 void prepare_to_jump_from_interpreted(); 200 void jump_from_interpreted(Register method, Register temp); 201 202 // Returning from interpreted functions 203 // 204 // Removes the current activation (incl. unlocking of monitors) 205 // and sets up the return address. This code is also used for 206 // exception unwindwing. In that case, we do not want to throw 207 // IllegalMonitorStateExceptions, since that might get us into an 208 // infinite rethrow exception loop. 209 // Additionally this code is used for popFrame and earlyReturn. 210 // In popFrame case we want to skip throwing an exception, 211 // installing an exception, and notifying jvmdi. 212 // In earlyReturn case we only want to skip throwing an exception 213 // and installing an exception. 214 void remove_activation(TosState state, Register ret_addr, 215 bool throw_monitor_exception = true, 216 bool install_monitor_exception = true, 217 bool notify_jvmdi = true); 218 #endif // CC_INTERP 219 void get_method_counters(Register method, Register mcs, Label& skip); 220 221 // Object locking 222 void lock_object (Register lock_reg); 223 void unlock_object(Register lock_reg); 224 225 #ifndef CC_INTERP 226 227 // Interpreter profiling operations 228 void set_method_data_pointer_for_bcp(); 229 void test_method_data_pointer(Register mdp, Label& zero_continue); 230 void verify_method_data_pointer(); 231 232 void set_mdp_data_at(Register mdp_in, int constant, Register value); 233 void increment_mdp_data_at(Address data, bool decrement = false); 234 void increment_mdp_data_at(Register mdp_in, int constant, 235 bool decrement = false); 236 void increment_mdp_data_at(Register mdp_in, Register reg, int constant, 237 bool decrement = false); 238 void increment_mask_and_jump(Address counter_addr, 239 int increment, Address mask, 240 Register scratch, bool preloaded, 241 Condition cond, Label* where); 242 void set_mdp_flag_at(Register mdp_in, int flag_constant); 243 void test_mdp_data_at(Register mdp_in, int offset, Register value, 244 Register test_value_out, 245 Label& not_equal_continue); 246 247 void record_klass_in_profile(Register receiver, Register mdp, 248 Register reg2, bool is_virtual_call); 249 void record_klass_in_profile_helper(Register receiver, Register mdp, 250 Register reg2, int start_row, 251 Label& done, bool is_virtual_call); 252 253 void update_mdp_by_offset(Register mdp_in, int offset_of_offset); 254 void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp); 255 void update_mdp_by_constant(Register mdp_in, int constant); 256 void update_mdp_for_ret(Register return_bci); 257 258 void profile_taken_branch(Register mdp, Register bumped_count); 259 void profile_not_taken_branch(Register mdp); 260 void profile_call(Register mdp); 261 void profile_final_call(Register mdp); 262 void profile_virtual_call(Register receiver, Register mdp, 263 Register scratch2, 264 bool receiver_can_be_null = false); 265 void profile_ret(Register return_bci, Register mdp); 266 void profile_null_seen(Register mdp); 267 void profile_typecheck(Register mdp, Register klass, Register scratch); 268 void profile_typecheck_failed(Register mdp); 269 void profile_switch_default(Register mdp); 270 void profile_switch_case(Register index_in_scratch, Register mdp, 271 Register scratch2); 272 273 // Debugging 274 // only if +VerifyOops && state == atos 275 void verify_oop(Register reg, TosState state = atos); 276 // only if +VerifyFPU && (state == ftos || state == dtos) 277 void verify_FPU(int stack_depth, TosState state = ftos); 278 279 #endif // !CC_INTERP 280 281 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode; 282 283 // support for jvmti/dtrace 284 void notify_method_entry(); 285 void notify_method_exit(TosState state, NotifyMethodExitMode mode); 286 287 private: 288 289 Register _locals_register; // register that contains the pointer to the locals 290 Register _bcp_register; // register that contains the bcp 291 292 public: 293 #ifndef CC_INTERP 294 void profile_obj_type(Register obj, const Address& mdo_addr); 295 void profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual); 296 void profile_return_type(Register mdp, Register ret, Register tmp); 297 void profile_parameters_type(Register mdp, Register tmp1, Register tmp2); 298 #endif /* !CC_INTERP */ 299 300 }; 301 302 #endif // CPU_X86_VM_INTERP_MASM_X86_HPP